によって engy saleh 14年前.
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Four Techniques To E
Various techniques are employed to examine the intricate details of paintings, revealing hidden layers and compositions. Ultraviolet (UV) spectrum analysis is used to study the surface layers and detect any oxidation in polyene materials, where changes in absorption can indicate aging.
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Four Techniques To Examine A Painting Fluorescene by short-wave and long-wave UV excitation from mercury lamp Provides information from top 50 microns of painting's surface By spectrometer, full emission collected from any area of painting X-ray Fluorescene (XRF) Can be detected for most metals and elements of atomic number 14 and larger Atoms emmit x-ray frequencies when de-excited Involves irradiating samples with x-rays to excite element's inner electrons To examine the elemental composition from different colored areas Ultraviolet (UV) Spectrum This causes their absorption to decrease polyene is oxidized over time using polyene Infrared Spectroscopy (IR) It gives an indication that there maybe is an under drawing It must be confirmed by another technique It doesnot directly detect the presence of metal nuclei To detect anomalies beneath paintings
